SF₆ Gas Leakage Repair & Seal Replacement Service

SF₆ gas leakage is one of the most common and critical issues in gas-insulated high-voltage equipment. Leakage typically occurs due to aging seals, damaged O-rings, loose flanges, valve defects, or mechanical stress.

EngineerBari™ delivers systematic leakage repair, starting from accurate leak detection to professional seal replacement and final gas restoration, following IEC standards and OEM-approved procedures.

Scope of Service

✅Identification and confirmation of SF₆ leakage points

✅Isolation of affected gas compartment

✅Controlled SF₆ gas recovery (if required)

✅Replacement of defective seals, O-rings, gaskets, and valves

✅ Flange cleaning, inspection, and re-tightening with torque control

✅Reassembly and sealing verification

✅Preparation for vacuuming and gas refilling

Applicable Equipment

✅Gas Insulated Switchgear (GIS)

✅ SF₆ Circuit Breakers (Indoor & Outdoor)

✅Gas compartments and chambers

✅Disconnectors and earthing switches

✅Gas valves, flanges, and monitoring ports

✅Transmission & distribution substations

Typical Causes of SF₆ Leakage

✅Aged or hardened O-rings and seals

✅ Improper flange tightening

✅Valve seat or gasket damage

✅Mechanical vibration or thermal cycling

✅Previous improper maintenance work

Repair Process (Step-by-Step)

✅ SF₆ leak detection and marking

✅Safety isolation and work permit confirmation

✅Gas recovery or pressure reduction (if required)

✅Seal/O-ring/gasket replacement

✅Mechanical reassembly with correct torque

✅Leak tightness verification

✅Preparation for vacuum and refilling

Standards & Compliance

✅IEC 62271 series

✅IEC 60480

✅OEM maintenance and sealing procedures

✅Utility and environmental compliance requirements

Deliverables

✅ SF₆ Leakage Repair Service Record

✅Details of replaced seals/components

✅ Leak-free confirmation status

✅Gas compartment identification

✅Recommendation for refilling or monitoring

Key Benefits

✅Permanent elimination of SF₆ gas leakage

✅Restores insulation and arc-quenching performance

✅Prevents repeated gas loss and alarms

✅Reduces environmental impact

✅Extends equipment service life

Transportation & Accommodation

For outstation or remote locations, transportation and accommodation shall be arranged by the client or charged separately as per the approved quotation.

Optional Add-On Services

✅ SF₆ Gas Leak Detection (Portable / Fixed)

✅ SF₆ Gas Recovery & Refilling

✅Gas Chamber Vacuum Service

✅SF₆ Gas Purity & Moisture Testing

✅ Annual SF₆ Inspection & Maintenance Contract (AMC)

Why Choose EngineerBari™?

✅Experienced SF₆ & GIS service engineers

✅Utility-grade repair procedures

✅Proper tools, torque control & safety discipline

✅Suitable for EPC, utility & national grid projects

✅Reliable on-site technical support